Snow globe and other special hydrodynamic features.

Stokes Paradox: How small particles move in water
Consider a snow globe. When shaken, the tiny flakes and particles are set into motion and “it snows”. What lights up kid’s eyes has been a long standing puzzle for scientists, as there has been no consensus on how particles with shapes other than spheres, for example cylinders, settle though water. This problem is, however, of great relevant and finds application also in the climate research. Now, scientists from Max Planck Institute for Marine Microbiology, Germany have shed light onto this problem, and present a solution. (Mehr in: Pressemitteilungen – idw – Informationsdienst Wissenschaft)